Research into farm animal cognition has revealed sophisticated abilities including emotional contagion, anticipatory states, and learning that deepen the ethical case for their welfare.
The cognitive complexity of farm animals undermines any remaining basis for dismissing their welfare as unimportant. Emotional contagion in cows means that fear experienced by one animal spreads through a herd, multiplying welfare harm. Cognitive bias testing in pigs — exposing animals to ambiguous stimuli and measuring whether their response is optimistic or pessimistic — provides a validated measure of emotional state that is directly linked to housing quality. Sheep with two-year facial recognition memories are social animals for whom separation from familiar individuals represents a welfare cost that animal memory can extend across time. These findings demand that welfare interventions address not just physical conditions but the emotional and cognitive dimensions of animal experience.